I have fished the The Skeena several times during the summer chinook run, haven't fished the kenai but I have a good friend who lives up their and fishes it. The skeena you want to be there the last week of July up until about August the 5th, that's when the big Kalum fish show up. I would say if you have good eggs and know how to backtroll reasonably well you could expect to hook 5-10 fish/day for the boat, during a good year many more, averaging 30-40Ibs, if you time it when the Kalum fish are there it seems like about every 4th fish is close to or over the 50 Ib mark. If you need more info PM me, I also am good friends with a reputable guide in Terrace.